David Tennant is the narrator for a new five part BBC One documentary, Spy In The Wild, which starts tomorrow at 8pm.
In one of the most innovative natural history series ever presented, Spy In The Wild deploys over 30 ultra-realistic animatronic 'Spy Creatures' to go undercover in the animal world, filming their unique behaviour closer than ever before.
In episode one the Spy Creatures investigate the rarely-seen emotions and feelings of animals - and ask if they are as complicated and strong as our own. Through these Spy Creatures' eyes we discover the origins of love.
Take a look at some clips of episode one below:
Spy prairie dog reveals intimate kissing among prairie dogs.
Langur monkeys mistake the motionless robotic spy monkey that was accidentally dropped as a lifeless baby langur and begin to grieve.
Spy croc hatching films a mother croc with her babies closer than ever before and reveals the caring side of a fierce creature.
A young chimpanzee looks after an abandoned genet kitten